Accessory for steam boilers



I. HARTER. ACCESSORY FOR STEAM BOILERS. APPLICATION FILED 0CT.12, 1920.

1,412,865,, Patented p 118, 1922.

INVENTOR.

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entree ISAAC EASTER, OF DONGAN HILLS, NEW YORK, ASSIGNOR TO THE BABOOCK & 1 7111 30X COMPANY, OF BAYONNE, JERSEY, A OOEEQRATION 03 N E1217 JERSEY.

ACCESSORY FDR STEAIJI BOILERS.

Specification of Letters Eatent.

Patented Apr. 18,

Application filed October 12, 1920. Serial No. 416,456.

To all whom it may cancer-a:

, Be ithnown that I. Ismxc I-IAirricn. a citizen of the United States, residing at Dongan Hills. in the county of Richmond and State of Few York, have invented certain new and useful Improvements in an Accessory for Steam Boilers, of which the following is a specification.

In modern boiler installations where the boilers are thoroughly protected from radiation losses by a covering of heat insulation, the condensed water in the discharge pipe from the safety valve is likely to freeze in cold weather, and such freezing, even though the safety valve itself opens properly under excessive boiler pressure, likely to result is a boiler explosion. In accordance with my invention, provision is made for normally discharging the steam blown from the safety valve to the space without the boiler room, but constructed I and arranged to permit the steam to be discharged adjacent to the safety valve in case of a closure of the discharge pipe, such. as is liable to result from freezing of the condensed steam therein.

My invention will best be understood by reference to the accompanying drawings, in which Figure 1 is a side elevation, partially in section, of a device embodying one form of my invention; Figs. 2 and 3 are similar views showing modified forms of my invention, and Fig. 4 is a side elevation illustrating a still further modification.

Like reference characters indicate like parts throughout the drawings.

Referring now to the drawings, and first to Fig. 1., 10 is a steam boiler to which fitted a safety valve 11 which may be of any desired construction. To the safety valve 11 is connected a discharge nozzle 12, the nozzle bein in sufliciently good thermal re lation to the safety valve and the boiler to prevent freezing of any liquid therein. A pipe 13 discharges the steam at a desired point, as through the roof or the side walls of the boiler setting. The inner end of the pipe 13 is preferably flared, as at 14, so as to form an enlarged end which surrounds the discharge end of the nozzle 12, and thus forms therewith a connection which is open to the atmosphere. The inner end of the pipe 13 is preferably kept in axial alignment with the discharge nozzle 12 by a member 15 which is clamped tothe nozzle 12, at 16, and which is provided with arms extending outwardly beneath tho flared edge 1% of the pipe 13. the being provided with notches, as at 17, within which the flared edge is received. A drain pipe 18 is preferably connected to the nozzle 12.

In operation, the steam discharged from the safety valve creates an aspirating action within the pipe 13, and all of the steam passes through the pipe 13 to the desired discharge point. In case of closure of the pipe 13, however, as by freezing of the condensed water therein, the steam discharged from the safety valve .11 will pass from the (flischarge end of the nozzle 12 beneath the flared end 14 of the discharge pipe and to the atmosphere within the boiler room, so that the boiler is, in any case, relieved of excessive pressure.

In the arrangement shown in Fig. 2, the discharge nozzle 12 and the lower flared end 14 of the discharge pipe are surrounded by a bowl 19 fitted around the discharge nozzle 12, as at 20, and open at its upper end, as at 21. V The bowl is preferably provided with a drain pipe 22 which may be connected to the drain pipe 18 for the discharge nozzle, as at 23. The provision of the bowl 19 serves to direct the steam which may be discharged from the open connection between the discharge nozzle 12 and the dis charge pipe 13 upwardly, and thus prevent injury to an operator who might be on top of the boiler when steam is blown from the safety valve. I

Fig. 3 illustrates a further modification of my invention, in which the top of the bowl 19 is provided with a cover 24 which forms a loose fit 25 around the discharge pipe 13 and normally rests on the bowl 19. In case of discharge of steam through the bowl, the cover 24 is lifted, thus permitting escape of the steam.

In the construction shown in Fig. 4, a plurality of plates 26 are hinged at 27 to the upper edge of the bowl 19 and normally rest against the lower flared end 1 1 of the discharge pipe 13. The flared end,in the form here shown, is preferably octagonal, or is otherwise angularly formed, and the plates 26 are so formed as to completely close the space above the bowl when they rest against the flared end 14 in the positions indicated by the full lines. In case of closure of the discharge pipe 13, the pressure created by the steam in the bowl l9 readily blows open the plates 26 and permits the escape of the steam upwardly to the atmosphere.

lVhat I claim and desire to secure by Letters Patent of the United States is:

l. The combination with a steam boiler safety valve having a steam outlet, oi a conduit through which the steam emerging from the outlet normally passes, the conduit entrance and the steam outlet being arranged to permit the steam to pass from the outlet to the atmosphere when the conduit is clogged or accidentally closed.

2. In combination, safety valve lOl a steam boiler, connections for normally C scharging the steam emerging from the valve to a desired point, said connections being constructed and arranged. to permit the steam, when said connections become clogged, to escape to the atmosphere at a point short of the clogged part.

in combination, a safety valve for a steam boiler, a pipe for discharging the steam blown from the valve to a desired 7 point, and. a connection between said valve and said pipe constructed and arranged to cause the steam normally to pass from said valie through said pipe and to pass from said valve directly to the atmosphere in case of the closure of said pipe.

l. In combination, a safety alve for a steam boiler, a pipe for discharging the steam blown from the boiler to a desired point, and a connection between said valve and said pipe open to the atmosphere and constructed and arranged to cause the steam normally to pass from said valve through said pipe.

In combination, a safety valve for a steam boiler, apipe for discharging the steam blown from the boiler to a desired point, and a nozzle connected to said valve and leading to said pipe and constructed and arranged to cause the steam blown from said valve normally to discharge through said pipe and to escape to the atmosphere in case of the closure of said pipe.

6. In a steam boiler provi ;led with a safety valve, a discharge nozzle for said valve in sutliciently good thermal. relation to said valve and to the boiler to prevent "freezing of liquid therein under normal operating con ditions, and a pipe for discharging tliej steam blown from said valve to a desired point, the connection between said nozzle and said p pe (being constructed and arranged to cause the steam blown from said valve nor mally to pass through said pipe but to pass asst directly to the ol said pipe. 7 i

7. in a steam boiler provided with a safety valve, a discharge nozzle-tor said valve in sul'liciently good. thermal relation to said valve and, to the boiler to prevent freezing of liquid therein under normal operating conditions, and a pipe for discharging the steam blown from said valve to a desired point, the connection between said nozzle and said pipe being constructed and ar ranged to cause the steam blown from said valve normally to through said pipe but to pass upwardly directly to the atmosphere in case of closure Olf SLlCl pipe.

8. in combination, a safety valve for a steam boiler, a discharge nozzle connected. thereto, and a pipe for discharging the steam blown from said valve to a desired point and provided with a flared end larger than and surrounding said nozzle.

9. in combination, a safety valve for a steam boiler, a discharge nozzle connected thereto and in suli'icientl y good thermal relation to said valve and to said boiler to prevent treezing of liquid therein, and a pipe for discharging the steam blown from said valve to a desired point and provided with atmosphere in case of closure a tiered end larger than and surrounding.

said nozzle. 7

10, In combination, a'sa'lety valve lior'a steam boiler,an upwardly directed discharge nozzle connected to said valve, a bowlfitted about said nozzle and open at its upper end, and a pipe for discharging the steam blown from said valve to a desired point and having its inner end extending into said bowl and surroi'inding said nozzle.

11. in combination, a safety valve for a steam boiler, an upwardly directed discharge nozzle connected to said valve, a bowl fitted about said nozzle and open at its upper end and a pipe for discharging the steam blown from said valve to a desired point and having its inner end flared and arranged in axial alignment with and surrounding said nozzle, tree communication being provided between said nozzle and the atmosphere through said bowl.

1.2. In combination, a safety valve for a steam boiler, an upwardly directed discharge nozzle connected to said valve, abowl titted about said nozzle and open at its upper end, a pipe for discharging the steam blown from said valve to a desired point and having its inner end extending into said bowl and surrounding said nozzle, and a drain pipe connected to the lower part of said bowl.

V ISAAC. HARTER. 

